Computer Fundamentals and Aptitude

Option (2) is correct.

The kernel is the core memory-resident portion of an operating system that manages system resources. Registry stores configuration, API is interface, and CMOS stores BIOS settings.

POST (Power-On Self-Test) is the process that checks if essential peripheral devices are attached and operational during boot. Configuration is a process, CMOS is memory chip, ROM is read-only memory.

BIOS (Basic Input/Output System) is firmware stored on a ROM chip that initializes hardware components during startup and loads the operating system bootloader from the hard drive into RAM. This bootstrap process is essential for getting the computer running.

POST (Power-On Self-Test) is a firmware routine that tests essential hardware components like video cards, memory chips, and performs BIOS identification. ScanDisk is a Windows disk-checking utility that runs after the OS boots if needed, not during POST.

Details view in Windows Explorer displays multiple columns of metadata for each file, including file size, modification date, file type, and other attributes. List view only shows names, thumbnails shows previews, and icon view uses large icons without details.

Option (1) is correct.

File systems organize contents hierarchically using drives (like C:), folders (directories) for grouping, and individual files. 'Systems' is not a structural element in file organization - it's an abstract concept, not a container or item.

In Windows Explorer's tree view, a plus (+) sign (or triangle) next to a folder indicates that it contains subfolders and can be expanded to show them. Once expanded, it changes to a minus (-) sign, and if empty, it has no sign.

A data warehouse is a centralized repository that stores all information collected during database development, designed for query, analysis, and reporting. A repository typically stores metadata, RAD is a methodology, and CASE is a category of development tools.

WAP (Wireless Application Protocol) enables mobile devices with limited capabilities to access internet services like web browsing and email. TCP/IP and Ethernet are wired/wireless networking protocols, while Token ring is a legacy LAN technology.

Files are stored on secondary storage devices like hard disks or SSDs for permanent retention, not in RAM. RAM is volatile memory that loses data when power is cut, making it unsuitable for permanent file storage.

MICR (Magnetic Ink Character Recognition) uses special magnetically charged ink printed characters, primarily on cheques, that banks can read electronically for fast and accurate cheque clearing and processing.

End-user query tools provide graphical interfaces or wizards that allow data analysts to construct database queries and retrieve data without writing raw SQL code. Data extraction and data stores are backend processes, not user-facing tools.

Network site licenses permit multiple users on a network to access a single copy of software installed on a server, providing cost-effective sharing. Single-user licenses restrict to one user, while EULA is a legal agreement, not a license type.

Windows is a graphical user interface (GUI) environment where users interact with windows, icons, menus, and pointing devices. Command-driven environments like DOS require typing text commands, which is not how Windows operates.

Encryption is the process of converting data into a coded form that cannot be read without the proper decryption key. This ensures data confidentiality and security during storage or transmission. Compression reduces file size but doesn't secure data, while biometrics and ergonomics are unrelated to data protection.

FTP (File Transfer Protocol) is a standard network protocol used to transfer files between a client and server on a computer network. It's specifically designed for file transfer, not translation, transit, or typing. The protocol has been widely used since the early days of the Internet.

A gateway connects networks with different protocols and translates between them, enabling communication between dissimilar systems. Bridges connect similar networks, routers direct traffic, and modems convert digital signals to analog for transmission. Gateways operate at a higher level, handling protocol conversion.

A polymorphic virus changes its code each time it infects a new file, making it difficult for antivirus programs to detect through signature matching. This distinguishes it from other malware types like worms (which replicate repeatedly) or Trojan horses (which hide in legitimate programs). The constant code mutation is its defining characteristic.

RSA is a widely used public-key cryptosystem that utilizes two different keys, a public key for encryption and a private key for decryption, making it an asymmetric cryptosystem.

Neural networks can derive rules and patterns from real-world examples through training, making them suitable for learning from case data. Rule discovery is a process, not a specific technique. Signal processing deals with analog/digital signal manipulation, while case-based reasoning explicitly retrieves and adapts past cases rather than learning rules.

Low-power USB devices receive power through the USB cable itself, eliminating the need for separate power cables or external power supplies. This is one of USB's key advantages - it carries both data and power. The computer's power supply provides electricity through the USB port and cable.

Correct Answer: CD-RW

The most critical factor is whether the mouse connector matches the available port on your computer (PS/2, USB, wireless). Driver software is usually generic or easily downloadable, cord length is flexible, and button count is a preference. Without physical compatibility, the mouse simply won't work with your system.

Cookies are small text files stored on your computer that websites use to identify returning visitors and remember preferences, login state, and browsing activity. Plug-ins add functionality, scripts execute code, and ASPs are server-side technologies. Cookies specifically serve user identification across sessions.

Voice mail functions like an answering machine - callers can leave voice messages when the recipient is unavailable or chooses not to answer. Unlike email (text), chat (real-time text), or video conferencing (visual meetings), voice mail specifically stores audio messages for later retrieval. It's an asynchronous communication technology.

Metasearch engines (like MetaCrawler or Dogpile) submit your search query to multiple search engines simultaneously and aggregate the results. Webcrawlers and spiders collect web pages for search engine indexes, while hits are individual search results. The key characteristic is the simultaneous submission to multiple engines.

DOS floppy disks contain essential file system structures including a boot record (for loading the OS), a file allocation table (for tracking file locations), and a root directory (for organizing files). However, virtual memory is a memory management technique used by modern operating systems to extend RAM using disk space, which DOS floppy disks do not implement.